JetBrains Rider 2018.1 Help

Keymap:

Use Base Type Where Possible refactoring

This refactoring helps replace references to a type with references to one of its base types. JetBrains Rider will analyze all references to the type in the whole solution and update those that can be safely replaced with references to the selected base type. Optionally, you can also replace references in is and typeof operators.

Optionally, select whether you want to replace type usages in the is operator and/or in the typeof operator.

To apply the refactoring, click Next.

If no conflicts are found, JetBrains Rider performs the refactoring immediately. Otherwise, it prompts you to resolve conflicts.

Right after the refactoring has been completed, all changes that it makes anywhere, including other files, are registered as a single operation. So you can use the Undo action (Ctrl+Z) to roll back all these changes with a single keystroke.